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(No Model.) 3 Sheets-Sheet 1. J. G'REGSON & G. J. MURRAY.

SPINNING AND TWISTING FRAME.

Patented Dec. 22, 189.6.

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(No Model.) 3 Sheets-Sheet 2. J.'GREGSON & O. J. MURRAY. SPINNING ANDTWISTING FRAME.

No. 573,649. Patented Dec. 22, 1896.

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SPINNING AND TWISTING FR-AME.

No. 573,649. Patented Dec. 22,1896;

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UNITED STATES PATENT OFFICE.

JOHL GREGSON AND CHARLES J. MURRAY, OF FALL RIVER, MASSACHUSETTS,

ASSIGNORS TO THE WHITIN MACHINE IVORKS, OF WHITINSVILLE, MAS-SAOHUSETTS.

SPINNING AND TWISTING FRAM E.

SPECIFICATION forming part of Letters Patent No. 573,649, dated December22, 1896.

To all whom, it may concern.-

Be it known that we, JOHN GREGSON and CHARLES J. MURRAY, citizens of theUnited States, residing at Fall River, in the county of Bristol andState of Massachusetts, have invented a new and useful Improvement inSpinning and Twisting Frames, of which the following is a full, clear,and exact description, reference being had to the accompanyr0 ingdrawings, forming a part of this specification, in explaining itsnature.

The invention relates to that class of spinning and twisting frames inwhich the ringrail carrying the travelers is provided with a verticalmovement upward and downward in relation to the spindles; and itconsists in means for holding the ring-rail in its lowest positionagainst the stress of the overbalancing-weights which move'it upward forthe purpose of permitting the removal from the spindles of the bobbinswhen they have been filled, or dotting, as itis called.

It should be understood that when the frame is stopped for the purposeof dotting the ring- 2 5 rail may become stationary at any height inrespect to the spindles and bobbins, and that it is not possible toremove the bobbins from the spindles unless the ring-rail or someconnection thereof be forced down by hand or 0 by the foot to its lowestposition, where it must either be held by hand or foot during thedoifing or else must be wedged down by anything which may come handy,and which may be placed anywhere to effect the desired 3 5 result.Commonly an empty bobbin is used for this purpose.

Our invention consists in means connected with the frame of the machinelocated in operative relation to the ring-rail or some part 40 of itsoperative mechanism and adapted to be moved into engagement therewithwhen the ring-rail has been moved downward to a doding position, wherebythe correct position of the rail for doffing is indicated, the rail helddown during dotting against the tendency of the overbalancing-weights tolift it, and the weights held in their elevated position.-

lVe will now describe ourinvention in detail in connection with thedrawings, wherein- Application filed January 22, 1896. Serial No.576,386. (No model.)

Figure l is a view in front elevation of a ring-spinning framecontaining our improvement. Fig. 2 is a view in end elevation thereof.Fig. 3 is a detail view in vertical section upon the dotted line 1 1 ofFig. l and in elevation of parts beyond said line. Figs. at and 5 5 5are detail views representing a modified form of our invention. Fig. 6is a view in perspective representing the normal position of thesafety-holder shown in Figs. 1 to 3.

In order to understand the use and operation of our invention, it isnecessary to describe the mechanism for providing the ringrail with itsvertical travel.

The ring-rail A is mounted upon a number of vertical rods a, which aresuitably supported, and to which vertical movements are imparted by therock-shafts a, each rock-shaf t having an arm a which is connected withthe lower end of a rod a and an arm a These latter arms a with theexception of the one nearest the operating devices, are connected witheach other by a long bar a (See Fig. 1.) That one of the arms a nearestthe operating devices is connected with the builder-lever B by the chaina which passes about the roll 7 5 a to the take-up roll I) of thebuilder-lever.

This lever is operated by a cam in the usual way, and the take-upthereon is also operated in the usual manner, and the lever serves tomove the ring-rail downward and in opposition to theoverbalancing-weights O, with one of which weights each rock-shaft a isconnected, the overbalancing-weights serving to lift the ring-rail whenthe builder-lever cam permits an upward movement to be imparted to thesaid lever and the ring-rail.

It will be seen from what we have said that the ring-rail may always bemoved downward by hand from any position above its lowest by moving ordrawing downward the vertical 9o rods to or the outer ends of the arms aby pressing downward the rail itself, or by moving horizontally towardthe builder-lever the connecting-bar a By so doing the drawchain a willbecome slack and cease to sup- 5 port or hold the overbalancing-weightsO and the stress of the said weights will be entirely upon the part laidhold of in depressing the 'oted.

rail and will be borne by it until it has been released, and the weightswhen so held, it suddenly let go, snap upward the ring-rail and itsconnection with sufficient force to damage some part. It is thereforevery desirable that there shall be some secure means for holding theweights in their lifted position and the ring-rail in its lowermost. Themakeshift heretofore employed for this purpose very often accidentallyslipped or was forced from place, suddenly releasing the weights,permitting them to fall with great force, lifting the ring-rail with asnap, and bringing stress upon the chain, take-up, and buildinglever,which often broke or injured some of its OPQIELtlXB parts.

In Fig. 1 we have represented our invention as applied in the form of asafety-arm D, which not only serves to locate the ringrail in properposition for dofiing, but also to securely hold the weights in theirelevated position. It is attached at its upper end to the under surfaceof the stationary rail 01 by a hanger d, bolted to the rail and havingears to which said upper end of the arm is piv- These ears are so shapedas to allow the lower end D of the arm to have a swinging movementinward and outward from the front of the machine. The hanger is also solocated upon the under surface of the said rail that the said lower endof said safety-arm can be moved upon the upper edge of the arm a of oneof the rock-shafts a when the said arm is in its lowest position andwhen the safetyarm can thus be moved to a position over said arm (L2 itindicates that the ring-rail is in its lowest position or the positionto which it should be moved for doffing, and it at the same time servesto hold all the weights 0 in their elevated position and to hold them soelevated during the doffing operation.

We prefer that the safety-arm be so located in relation to the arm athat in its normal or inoperative position it will hang free from saidarm or at one side thereof, as represented in dotted lines in Fig. 3 andin perspective in Fig. 6, and so that the said arm may travel upward anddownward at one side of it without coming into contact with it, and alsoso that it will require a positive action by the operator to move itinto its holding relation with said arm. Ive also prefer that it be solocated as to engage the said arm a near its outer end, (see Fig. 1,) asthe strain upon it will not be so great as it would be if near the shaftor. Butone of these safety-arms will be needed for one entire side ofthe spinningframe, the rock-shafts being connected with each other bythe bar a so that the downward movement of one arm a will cause thedownward movement of all the others and the upward movement of all theweights.

\Ve prefer to apply the safety-arm to the portion of the machine nearestthe builderlever and to operate in connection with the arm a which isnearest it. (See Fig. 1). e also prefer that the lower end of thesafetyarm have a curved recess (1 into which the upper edge of the arm(A may close and thereby be more securely held.

It is desirable,for preventing expense in fitting and for the purposesof adjustment, that the safety-arm be made extensible, and we haverepresented as one means for so doing the construction shown in Figs. 1and 3, where it is represented as made in the two parts or sections d61*, the contiguous ends of which overlap each other and are connectedby a clamping-bolt which passes through a slot in one or both ends,whereby the lower section may be moved upward or downward in relation tothe upper section, as desired, and then be rigidly fastened thereto insuch position.

In Figs. 4c and 5 we have represented the safety-arm D as pivoted to asamson D instead of to the stationary rail cl, and its outer end isprovided with a movement upon a vertical are instead of with a movementupon a horizontal are, as in Fig. 1, and instead of engaging the arm aof the rock-shaft c it engages the arm a of said rock-shaft. We preferthat this engagement be eifected by means of an extension of the armdownwardly, as at (1 (see Fig. 4,) which enters an eye, cavity, orholder (1 secured to or integral with the said arm (0 In Fig. 4 thesafetyarm and the eye are separate parts and the arm is attached to thesamson by a separate bolt, which will permit of its swinging movement,or by means of a bolt already employed in connecting the samson withsome other part-of the machine. The eye is secured to the arm a by abolt or in any other desired way. This modification accomplishes thepurpose of the form of our invention as described and in practically thesame way. It serves, upon the lowering of the ring-rail, to fix itslowermost position and hold it therein, and it also acts to hold all theoverbalancing-weights in their highest position and precludes thepossibility of any accidental release thereof whereby damage may be donethe machine. It is preferably located to engage the arm a which isnearest the builder-lever, and engagement with but one arm of aspinningframe side is necessary.

The invention is adapted to be easily applied not only to new frames,but to frames which are now in use.

In use the operation of the spinning-frame is stopped and the ring-railis moved downward to dofling position by hand, thereby lifting theweights 0, slackening the chain a and until the safety-arm can be movedby hand to a position to engage some part of the ring rail operativemechanism, which has been moved by said downward movement of thering-rail; and when this engagement can be had it indicates that thering-rail is in doflfing position, and the engagement permanently holdsthe ring-rail in such position during the dotting and also holds theweights in their elevated position. This position of the parts ismaintained until dofling is completed, when the operator releases thering rail and the weights by the removal of the safety-arm, therebypermitting the ringrail to be moved upward until the slack has beentaken from the chain a and the weights 0 to move downward.

It will be seen that the safety-arm may be located upon other parts ofthe frame and make engagements with other parts of the ring-rail or itsoperative devices without departing from the essential spirit of theinvention.

Having thus fully described our invention, we claim and desire to secureby Letters Patent of the United States 1. In a spinning-frame, thecombination with the ringrail, and its traversing mech-

